Answer even numbers problems from Gollnick book (Basic Radiation Protection Technology) Chapter 4

Radiation Biology . Why is a larger dose of 1 MeV gamma rays needed than 150 kev gammy rays to produce skin erythema? Name three different late effects of radiation. For each effect chosen, dic cuss the possible late effect consequences of an acute dose of 200 rem." . Assuming you are representative of the U.S. average, what is the % chance at you will die of cancer? If you receive a single dose of O. 1 SV, according to DEIR VII estimates, what will be your % chance of dying of cancer? What would the radiation hormesis theory predict in this case? (Sex specific baseline can cer mortality risk in the USA is 22,810 per 100,000 males and 18,030 per 100,000 females.) 20. List some possible radiation produced effects following a human exposure of 50 rem, acute whole body, delivered during pregnancy. 21. Under the same conditions as Problem 20 just above, which effect would be most likely if the radiation were received in the Ist week of pregnancy? The 10th week of pregnancy? 22. Define the term "radiation hormesis." 23. Suggest a possible mechanism for radiation hormesis, i.e., what might be an underlying biological basis for hormesis? 24. What precautions should be observed in the use of radioprotective chemi- cals for reducing the effects of external radiation exposure? 25. What is the mechanism by which a blocking agent works? 26. Justify the statement, "If we had a comprehensive theory of human radiobi- ology we could discard ALARA." S-1. What role do lymphokines play in the body's immune response? S-2. What is a macrophage and what is its function? S-3. What are antibodies and where do they come from? S-4. Radiation produced changes in the DNA bases can be repaired to prevent genetic mutations to future generations of cells. What th or D role do checkpoint genes play in this process